Long-Term Incentive Plans - Summary of activity related to performance-based stock awards (Details) - Performance-based stock options	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Number of Shares/Units
Beginning balance (in shares) | shares	59,396
Granted (in shares) | shares	1,240,540
Vested (in shares) | shares	0
Forfeited/Cancelled (in shares) | shares	0
Ending balance (in shares) | shares	1,299,936
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars of shares) | $ / shares	$ 198.10
Granted (in dollars of shares) | $ / shares	209.59
Vested (in dollars of shares) | $ / shares	0
Forfeited/Cancelled (in dollars of shares) | $ / shares	0
Ending balance (in dollars of shares) | $ / shares	$ 209.06