Share-Based Compensation - Summary of Restricted Stock and Performance Units Activity (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restricted Stock
Restricted Stock and Performance Unit Activity [Roll Forward]
Outstanding at January 1		1,007,794	1,184,299	1,463,694
Granted		242,835	218,957	229,489
Vested		(443,627)	(389,481)	(507,222)
Forfeitures		(20,923)	(5,981)	(1,662)
Outstanding at December 31		786,079	1,007,794	1,184,299
Restricted Stock and Performance Unit Activity (Weighted Average Grant-date Fair Value) [Abstract]
Weighted average grant-date fair value, Outstanding at January 1		$ 49.47	$ 41.71	$ 31.48
Weighted average grant-date fair value, Granted		67.48	65.16	70.24
Weighted average grant-date fair value, Vested		34.11	32.77	26.29
Weighted average grant-date fair value, Forfeitures		59.63	66.42	61.05
Weighted average grant-date fair value, Outstanding at December 31		$ 63.44	$ 49.47	$ 41.71
Fair value of awards vested		$ 28.8	$ 26.3	$ 36.4
Performance Units
Restricted Stock and Performance Unit Activity [Roll Forward]
Outstanding at January 1		175,675	127,489	70,600
Granted		77,017	53,102	56,889
Vested	[1]	(20,604)	(4,916)	0
Outstanding at December 31		232,088	175,675	127,489
Restricted Stock and Performance Unit Activity (Weighted Average Grant-date Fair Value) [Abstract]
Weighted average grant-date fair value, Outstanding at January 1		$ 59.94	$ 58.25	$ 47.83
Weighted average grant-date fair value, Granted		67.57	65.04	71.19
Weighted average grant-date fair value, Vested	[1]	57.58	71.19	0.00
Weighted average grant-date fair value, Outstanding at December 31		$ 62.68	$ 59.94	$ 58.25
Fair value of awards vested		$ 1.1

[1] The total fair value of awards upon vesting for the year ended December 31, 2016 was $1.1 million. Upon vesting of the awards, PCA issued 21,111 shares of its common stock, which included 507 shares for dividends accrued during the vesting period.