Partners' Equity and Equity-Based Compensation Nonvested Unit Options Activity (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Deferred units
Number of Units
Unvested shares at period start (in shares) | shares	56
Granted (in shares) | shares	3
Forfeited (in shares) | shares	0
Vested (in shares) | shares	(10)
Unvested shares at period end (in shares) | shares	49
Weighted Average Grant Date Fair Value Per Unit
Unvested shares at period start (in dollars per share) | $ / shares	$ 54.21
Granted (in dollars per share) | $ / shares	54.17
Forfeited (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	54.45
Unvested Shares at period end (in dollars per share) | $ / shares	$ 54.16
Performance units
Number of Units
Unvested shares at period start (in shares) | shares	379
Granted (in shares) | shares	131
Forfeited (in shares) | shares	(14)
Vested (in shares) | shares	(101)
Unvested shares at period end (in shares) | shares	395
Weighted Average Grant Date Fair Value Per Unit
Unvested shares at period start (in dollars per share) | $ / shares	$ 56.86
Granted (in dollars per share) | $ / shares	55.63
Forfeited (in dollars per share) | $ / shares	58.10
Vested (in dollars per share) | $ / shares	57.00
Unvested Shares at period end (in dollars per share) | $ / shares	$ 56.36
Restricted units
Number of Units
Unvested shares at period start (in shares) | shares	310
Granted (in shares) | shares	77
Forfeited (in shares) | shares	(6)
Vested (in shares) | shares	(71)
Unvested shares at period end (in shares) | shares	310
Weighted Average Grant Date Fair Value Per Unit
Unvested shares at period start (in dollars per share) | $ / shares	$ 57.85
Granted (in dollars per share) | $ / shares	55.44
Forfeited (in dollars per share) | $ / shares	57.02
Vested (in dollars per share) | $ / shares	58.60
Unvested Shares at period end (in dollars per share) | $ / shares	$ 57.07