Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Jun. 27, 2015	Jun. 28, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	$ 103.5	$ (15.3)	$ 139.6
OCI before reclassifications	(129.1)	(64.5)	(51.0)
Amounts reclassified from AOCI	10.3	(2.0)	14.9
Other comprehensive income (loss)	(118.8)	(66.5)	(36.1)	$ 62.6
Balance,ending	(15.3)	(81.8)	103.5	139.6
Fair value of derivative financial instruments, net of tax
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	(16.3)	(14.2)	(16.1)
OCI before reclassifications	1.1	(5.4)	(15.1)
Amounts reclassified from AOCI	1.0	0.1	14.9
Other comprehensive income (loss)	2.1	(5.3)	(0.2)
Balance,ending	(14.2)	(19.5)	(16.3)	(16.1)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	130.9	(4.6)	164.4
OCI before reclassifications	(135.5)	(63.3)	(33.5)
Amounts reclassified from AOCI	0.0	0.0	0.0
Other comprehensive income (loss)	(135.5)	(63.3)	(33.5)
Balance,ending	(4.6)	(67.9)	130.9	164.4
Fair value of investment securities, net of tax
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	(2.9)	6.4	2.4
OCI before reclassifications	(1.4)	7.4	(5.3)
Amounts reclassified from AOCI	10.7	1.3	0.0
Other comprehensive income (loss)	9.3	8.7	(5.3)
Balance,ending	6.4	15.1	(2.9)	2.4
Post-retirement and pension liability adjustments, net of tax
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning	(8.2)	(2.9)	(11.1)
OCI before reclassifications	6.7	(3.2)	2.9
Amounts reclassified from AOCI	(1.4)	(3.4)	0.0
Other comprehensive income (loss)	5.3	(6.6)	2.9
Balance,ending	$ (2.9)	$ (9.5)	$ (8.2)	$ (11.1)