Goodwill and Other Intangible Assets Schedule of Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016	[1]	Dec. 01, 2016
Business Acquisition [Line Items]
Goodwill	$ 5,084	$ 5,166
Ritmo Investimentos
Business Acquisition [Line Items]
Current Assets				$ 44
Property				72
Goodwill				145
Intangible Assets				179
Current liabilities				(48)
Non-current deferred tax liability and other				(13)
Total acquired assets and assumed liabilities, net				$ 379

[1] Condensed from audited financial statements.