Consolidated Statements of Redeemable Noncontrolling Interest and Stockholders' Equity (Parenthetical) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($) $ / shares
2.00% Convertible Senior Notes due in 2024 [Member]
Interest Rate	2.00%
May 2019 Public Offering [Member]
Common stock issued, per share \| $ / shares	$ 48.60
Common stock public offering issuance costs \| $	$ 15

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant