For the Years Ended December 31, | ||||||||||||
(in millions) | 2013 | 2012 | 2011 | |||||||||
Operating activities | ||||||||||||
Cash flows from operating activities | $ | 5,099 | $ | 6,116 | $ | 5,560 | ||||||
Investing activities | ||||||||||||
Issuance of notes to subsidiaries | (1,517 | ) | (4,149 | ) | — | |||||||
Repayments of notes receivable from subsidiaries | 275 | — | — | |||||||||
Cash paid for acquisitions | (274 | ) | (3,737 | ) | (2,081 | ) | ||||||
Capital contributions to subsidiaries | (942 | ) | (99 | ) | (171 | ) | ||||||
Cash flows used for investing activities | (2,458 | ) | (7,985 | ) | (2,252 | ) | ||||||
Financing activities | ||||||||||||
Common stock repurchases | (3,170 | ) | (3,084 | ) | (2,994 | ) | ||||||
Proceeds from common stock issuances | 598 | 1,078 | 381 | |||||||||
Cash dividends paid | (1,056 | ) | (820 | ) | (651 | ) | ||||||
(Repayments of) proceeds from commercial paper, net | (474 | ) | 1,587 | (933 | ) | |||||||
Proceeds from issuance of long term debt | 2,235 | 3,966 | 2,234 | |||||||||
Repayments of long-term debt | (943 | ) | (986 | ) | (955 | ) | ||||||
Interest rate swap termination | — | — | 132 | |||||||||
Proceeds of note from subsidiary | 40 | 30 | 15 | |||||||||
Other | (74 | ) | (383 | ) | 53 | |||||||
Cash flows used for financing activities | (2,844 | ) | 1,388 | (2,718 | ) | |||||||
(Decrease) increase in cash and cash equivalents | (203 | ) | (481 | ) | 590 | |||||||
Cash and cash equivalents, beginning of period | 1,025 | 1,506 | 916 | |||||||||
Cash and cash equivalents, end of period | $ | 822 | $ | 1,025 | $ | 1,506 | ||||||
Supplemental cash flow disclosures | ||||||||||||
Cash paid for interest | $ | 618 | $ | 547 | $ | 418 | ||||||
Cash paid for income taxes | 2,765 | 2,666 | 2,739 | |||||||||