Stockholders' Equity - Share Repurchase Program (Details) - 2017 Share Repurchase program	1 Months Ended
Aug. 31, 2017 USD ($)
Share Repurchase Program
Amount of shares authorized to be repurchased	$ 1,000,000,000.0
Term of share repurchase program	4 years
Stock repurchase program, expiration date	Sep. 30, 2021

Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_StockRepurchaseProgramPeriodInForce1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration