Debt - Convertible Senior Notes due in 2021 Narrative (Details)										1 Months Ended		12 Months Ended
	Dec. 18, 2021 USD ($) shares	Dec. 01, 2021 USD ($) shares	Jul. 06, 2021 USD ($) shares	Dec. 18, 2020 USD ($)	May 19, 2020 USD ($)	Oct. 09, 2019 USD ($)	Sep. 09, 2019 USD ($)	Jul. 03, 2018 USD ($)	Dec. 12, 2016 USD ($)	Jul. 31, 2021 shares	May 31, 2020 USD ($)	Dec. 31, 2021 USD ($) day $ / shares shares	Dec. 31, 2020 USD ($) day shares	Dec. 31, 2019 USD ($)	Dec. 17, 2021 USD ($)	May 26, 2021 USD ($) $ / shares	Nov. 04, 2020 USD ($)	May 15, 2020 USD ($)
Debt Instrument [Line Items]
Net proceeds from issuance												$ 0	$ 553,282,000	$ 1,157,675,000
Net proceeds used to purchase capped call confirmations												0	0	$ 159,677,000
Capped call confirmations, portion unwound, value received	$ 14,800,000	$ 43,000,000
Class C Capital Stock
Debt Instrument [Line Items]
Settlement of convertible senior notes (in shares) | shares										4,700,000
Capped call confirmations, portion unwound, shares received (in shares) | shares	317,865	665,532
Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount												1,672,180,000
Aggregate principal amount settled												$ 439,568,000
Shares of Class C capital stock issued | shares												6,264,925
2.0% convertible senior notes due 2021 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount									$ 460,000,000
Debt instrument, interest rate stated percentage									2.00%
Net proceeds from issuance									$ 447,800,000
Net proceeds used to purchase capped call confirmations									36,600,000
Aggregate principal amount settled													$ 460,000,000
Shares of Class C capital stock issued | shares													5,819,561
Repayments of convertible debt				$ 100,000							$ 194,700,000
Repurchased amount																	$ 265,300,000
2.0% convertible senior notes due 2021 | Convertible Debt | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Repurchased amount															$ 265,200,000
2.0% convertible senior notes due 2021 | Convertible Debt | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Repurchased amount	$ 100,000
2.0% convertible senior notes due 2021, over-allotment option | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount									$ 60,000,000
Convertible Senior Notes Due 2024, 2025, 2026 | Convertible Debt
Debt Instrument [Line Items]
Repurchase price percentage of principal amount												100.00%
Debt instrument, convertible threshold percentage												130.00%
Debt instrument, convertible threshold trading days | day												20	20
Debt instrument, threshold consecutive trading days | day												30	30
1.375% convertible senior notes due 2026 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount							$ 500,000,000					$ 498,800,000
Debt instrument, interest rate stated percentage												1.375%
Net proceeds from issuance							493,500,000
Net proceeds used to purchase capped call confirmations							75,400,000
Equity component of issuance of senior notes												$ 171,800,000
Conversion price per share (usd per share) | $ / shares												$ 43.51
Aggregate principal amount settled												$ 1,200,000
Shares of Class C capital stock issued | shares												27,579
2.75% convertible senior notes due 2025 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount					$ 65,000,000							$ 564,998,000						$ 500,000,000
Debt instrument, interest rate stated percentage					2.75%							2.75%						2.75%
Net proceeds from issuance					$ 553,300,000
Equity component of issuance of senior notes												$ 154,800,000
Conversion price per share (usd per share) | $ / shares												$ 67.20
0.75% convertible senior notes due 2024 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount						$ 73,000,000	600,000,000					$ 608,382,000
Debt instrument, interest rate stated percentage						0.75%						0.75%
Net proceeds from issuance						$ 72,000,000	592,200,000
Net proceeds used to purchase capped call confirmations						$ 9,100,000	$ 75,200,000
Equity component of issuance of senior notes												$ 165,900,000
Conversion price per share (usd per share) | $ / shares												$ 43.51
Aggregate principal amount settled												$ 64,618,000
Shares of Class C capital stock issued | shares												1,485,114
1.50% convertible senior notes due 2023 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, face amount								$ 373,800,000				$ 0
Debt instrument, interest rate stated percentage												1.50%
Net proceeds from issuance								364,000,000
Net proceeds used to purchase capped call confirmations								$ 29,400,000
Debt instrument, notice for redemption of convertible debt, amount																$ 372,800,000
Conversion price per share (usd per share) | $ / shares																$ 78.37
Aggregate principal amount settled												$ 373,750,000
Shares of Class C capital stock issued | shares												4,752,232
Repayments of convertible debt			$ 1,300,000
1.50% convertible senior notes due 2023 | Convertible Debt | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Aggregate principal amount settled												$ 371,500,000
1.50% convertible senior notes due 2023 | Convertible Debt | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Shares of Class C capital stock issued | shares			1,300,000