Commitments and Contingencies - Narrative (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Commitment and Contingencies [Line Items]
Estimate of possible loss	$ 112,000,000
Loss accrual	37,000,000
Indirect tax contingency	37,000,000
Senior Notes [Member]
Commitment and Contingencies [Line Items]
Debt instrument, face amount	$ 31,549,000,000	$ 29,008,000,000

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant