CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss) including noncontrolling interests	$ 286.1	$ 203.8	$ 822.3	$ 541.2
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	214.9	(57.8)	607.0	55.9
Unrealized gain (loss) on derivative and non-derivative financial instruments	(38.9)	(8.8)	(116.1)	(35.4)
Reclassification of derivative (gain) loss to income	0.9	0.0	0.5	(3.1)
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income	6.7	6.9	15.0	20.9
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0.9	0.3	2.9	21.7
Total other comprehensive income (loss), net of tax	184.5	(59.4)	509.3	60.0
Comprehensive income (loss)	470.6	144.4	1,331.6	601.2
Comprehensive (income) loss attributable to noncontrolling interests	(6.9)	(1.3)	(20.1)	(2.1)
Comprehensive income (loss) attributable to Molson Coors Brewing Company	463.7	143.1	1,311.5	599.1
Consolidated [Member]
Net income (loss) including noncontrolling interests	286.1	203.8	822.3	541.2
Other comprehensive income (loss), net of tax:
Comprehensive income (loss) attributable to Molson Coors Brewing Company	$ 463.7	$ 143.1	$ 1,311.5	$ 599.1