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Acquisitions and Investments (Tables) | 12 Months Ended
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Dec. 31, 2016
Business Combinations [Abstract] |
Summary of Acquisitions | A summary of the acquisitions follows (in millions):
|  | Years Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Fair value of assets acquired, net of cash acquired |  | $ | 357 |  |  | $ | 116 |  |  | $ | 406 |
Cash paid, net of cash acquired |  |  | (230 | ) |  |  | (86 | ) |  |  | (291 | )
Liabilities assumed, debt issued and noncontrolling interest |  | $ | 127 |  |  | $ | 30 |  |  | $ | 115 |
Excess purchase price over fair value of net assets acquired |  | $ | 152 |  |  | $ | 51 |  |  | $ | 167 |

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