Share-Based Payments - Performance Stock Units Settled in Stock Activity (Details) - Performance stock units settled in stock shares in Thousands	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Shares
Beginning balance, unvested (in shares) | shares	155,000
Granted (in shares) | shares	110,000
Vested (in shares) | shares	(56,000)
Forfeited (in shares) | shares	(13,000)
Ending balance, unvested shares (in shares) | shares	196,000
Weighted Average Grant Date Fair Value
Beginning balance, unvested (in dollars per share) | $ / shares	$ 304.19
Granted (in dollars per share) | $ / shares	276.61
Vested (in dollars per share) | $ / shares	316.66
Forfeited (in dollars per share) | $ / shares	287.55
Ending balance, unvested (in dollars per share) | $ / shares	$ 289.94