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Capital Stock, Dividends and Common Stock Repurchase Program (Tables) | 12 Months Ended
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Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract] |
Share Repurchases under Common Stock Repurchase Programs | The following is a summary of our share repurchases under our common stock repurchase program for the years ended December 31:
|  | 2016(a) |  | 2015(b) |  | 2014(c)
Shares repurchased (in thousands) |  | 11,241 |  | 14,823 |  | 9,569
Weighted average per share purchase price |  | $60.49 |  | $49.83 |  | $43.89
Total repurchases (in millions) |  | $725 |  | $600 |  | $600
(a) | During 2016, we executed four ASR agreements to repurchase $725 million of our common stock. The ASR agreement entered into in November 2016 was for the repurchase of $225 million of our common stock. At the beginning of the repurchase period, we delivered $225 million in cash and received 2.8 million shares based on a stock price of $63.41 per share. The ASR agreement completed in February 2017, at which time we received 0.4 million additional shares based on a final weighted average per share purchase price during the repurchase period of $69.43.
(b) | During 2015, we executed and completed two ASR agreements to repurchase $600 million of our common stock. Our “Shares repurchased” also includes 2.8 million shares related to ASR agreements that were executed in 2014, discussed further below.
(c) | During 2014, we executed two ASR agreements to repurchase $600 million of our common stock. Our “Shares repurchased” includes the initial portion of shares repurchased based on the then-current market price of our common stock. The ASR agreements were completed in 2015 and the final weighted average per share purchase price during the repurchase period was $48.58.

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