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Subsequent Event (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2019	Dec. 31, 2016
Subsequent event | Minimum
Subsequent Event [Line Items]
Estimated cash payments	$ 80
Subsequent event | Maximum
Subsequent Event [Line Items]
Estimated cash payments	90
Common stock
Subsequent Event [Line Items]
Stock Repurchase Program, increased to authorized amount		$ 3,000
Common stock | Subsequent event
Subsequent Event [Line Items]
Stock Repurchase Program, increased to authorized amount	$ 2,000

X

- Definition

Increased to authorized shares repurchase amount for Stock Repurchase Program

+ References

No definition available.

+ Details

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X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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