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Shareholders' Equity (Summary of Activity Related to Restricted Stock Units) (Detail)	9 Months Ended
	Sep. 30, 2019 shares
Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding, shares at beginning	987,563
Granted	341,459
Forfeited	(46,503)
Vested and issued	(413,877)
Outstanding at ending	247,999
Outstanding, shares at ending	868,642
Performance Shares [Member]
Unvested shares
Outstanding, shares at beginning	532,086
Granted	152,656
Vested and issued	(180,258)
Outstanding, shares at ending	504,484
Progressive Waste Solutions Ltd. [Member] | Restricted Stock Units (RSUs) [Member]
Unvested shares
Outstanding at beginning	122,259
Cash settled	(46,023)
Forfeited	(2,352)
Outstanding at ending	73,884
Progressive Waste Solutions Ltd. [Member] | Performance Shares [Member]
Unvested shares
Outstanding at beginning	22,791
Cash settled	(22,791)

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The number of equity-based instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Rollforward [Abstract]

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested and issued during the reporting period.

+ References

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