Debt - Debt Instrument Redemption (6.00% Senior Notes) (Details) - 6.00% Senior Notes due 2026	12 Months Ended
Dec. 31, 2020
Redemption, Period One
Debt Instrument [Line Items]
Redemption price percentage	102.00%
Redemption, Period Two
Debt Instrument [Line Items]
Redemption price percentage	101.00%
Redemption, Period Three
Debt Instrument [Line Items]
Redemption price percentage	100.00%

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration